OpnForm
Calendar & ContactsBeautiful open-source form builder
Best Docker Calendar & Contacts for self-hosting
The 14 best Docker calendar & contacts you can self-host, ranked by community traction.
EteSync
Calendar & ContactsEnd-to-end encrypted sync for contacts and calendars
Replaces Google Calendar, iCloud
Bracket
Calendar & ContactsFlexible tournament system to build a tournament setup, add teams,
Claper
Calendar & ContactsThe ultimate tool to interact with your audience (alternative
OpenSlides
Calendar & ContactsPresentation and assembly system for managing and projecting agenda,
Manage My Damn Life
Calendar & ContactsManage my Damn Life (MMDL) is a self-hosted front end for managing
Xandikos
Calendar & ContactsGit-backed CalDAV and CardDAV server
Replaces Google Calendar, iCloud
Thunderbird Appointment
Calendar & ContactsSelf-hostable scheduling tool for booking meetings
Replaces Calendly, Doodle
Crab Fit
Calendar & ContactsOpen-source group availability finder for scheduling meetings
Replaces When2meet, Doodle
ClearFlask
Calendar & ContactsCommunity-feedback tool for managing incoming feedback
Christmas Community
Calendar & ContactsCreate a simple place for your entire family to use to find gifts
Seatsurfing
Calendar & ContactsWebbased app to book seats, desks and rooms for offices
Bitpoll
Calendar & ContactsConduct polls about dates, times or general questions
Revel
Calendar & ContactsCommunity-focused event management and ticketing platform
No apps match these filters.
At a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| OpnForm | Under-an-hour setup | Medium | 512 MB | AGPL-3.0 | 3,833 |
| EteSync | Under-an-hour setup | Medium | 256 MB | AGPL-3.0 | 1,773 |
| Bracket | Under-an-hour setup | Medium | 512 MB | AGPL-3.0 | 1,742 |
| Claper | Under-an-hour setup | Medium | 512 MB | GPL-3.0 | 812 |
| OpenSlides | Under-an-hour setup | Medium | 512 MB | MIT | 652 |
| Manage My Damn Life | Under-an-hour setup | Medium | 512 MB | GPL-3.0 | 642 |
| Xandikos | Under-an-hour setup | Medium | 64 MB | GPL-3.0 | 609 |
| Thunderbird Appointment | Under-an-hour setup | Medium | 512 MB | MPL-2.0 | 554 |
| Crab Fit | Under-an-hour setup | Easy | 256 MB | MIT | 532 |
| ClearFlask | Under-an-hour setup | Medium | 512 MB | AGPL-3.0 | 450 |
Quick picks
- Most adopted: OpnForm (3,833 GitHub stars).
- Lightest footprint: Xandikos (from 64 MB RAM, against 512 MB for the heaviest here).
- Licensing: 5 of 14 use AGPL-3.0; check the rest individually if you plan to modify and redistribute.
Every option here is open-source and self-hostable, tagged Docker within the calendar & contacts category. Deploy effort is graded from published container recipes, not vendor claims — see the methodology.